What are the four most common elements that living organisms are made up of?

Non renewable resources like petroleum eventually

An atom of lithium (li) and an atom of chlorine (cl) engage in a chemical reaction. which correctly describes the structure of the resulting chemical compound? hint: consider the class of each element. the chemical compound will have a network structure. the chemical compound will have triple bonds. the chemical compound will have a ball-and-stick structure. the chemical compound will have double bonds.

What is the empirical formula of c6h18o3? ch3o c2h5o c2h6o c2h5o5